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. 2020 Sep;20(3):1090–1108. doi: 10.4314/ahs.v20i3.11

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© 2020 Aruhomukama D.

Licensee African Health Sciences. This is an Open Access article distributed under the terms of the Creative commons Attribution License (https://creativecommons.org/licenses/BY/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 6 — Major zone distortions that indicated antibiotic inactivation (i.e., positive three dimensional test results) occurred in tests with piperacillin (A), cefuroxime (B), cefamandole (D), cefoperazone (E), CTX (F), ceftriaxone (G), and cefoxitin (I) but not in tests with aztreonam (C) or CAZ (H). Note the growth of small colonies in the cefoperazone (E) and CTX (F) zones in the vicinity of the three-dimensional inoculation site. The small colonies in this part of the zone also indicated enzymatic drug inactivation (i.e., positive three-dimensional test results). Reprinted from the Journal of Antimicrobial Agents and Chemotherapy (vol. 36, (9), pp.1877–1882), by Thomson, K.S. and Sanders, C.C., 1992. Copyright 1992 by the Journal of Antimicrobial Agents and Chemotherapy.